1963/08/07, 3. A Peckett 0-4-0ST "Thurwhit" (Class R2 No. 1734/1927) has returned from the exchange sidings with BR into the yard at Alpha Cement works near Purfleet in Essex, Wednesday 7th August 1963. The three cement silos can still be seen to this day, just to the west of the M25 on the north side of the Dartford crossing of the River Thames.